Continuously operating one-sided formatting and edge shaping machine

Abstract

A continuously operating one-sided formatting and edge shaping machine for edge processing four sides of work pieces is driven by a continuously running primary conveying means (10). A conveying device is mounted ahead of this single primary conveying means in the form of chain conveyors (18 and 20), which also operate continuously, so that a precisely aligned work piece can be transferred in this condition to the primary conveying means, for which purpose the two conveying means run synchronously with each other at least in the transfer area.

I claim: 
     
       1. A continuously operating one-sided formatting and edge shaping machine for shaping edges of four-sided work pieces, said machine having on a shaping side one primary conveying means for conveying work pieces being clamped on the primary conveying means by a compression assembly and having a front-mounted pre-conveying device for conveying the work pieces to the primary conveying means, the primary conveying means and the pre-conveying device being disposes in an overlapping manner, said pre-conveying device including a support for the work pieces, at least one stop and an entry straightedge guide for measuring and for correct angular positioning of the work pieces, the pre-conveying device being continuously operating conveying means having a conveyance movement which is synchronous with conveyance movement of the primary conveying means in the overlapping area, the pre-conveying device is associated with an aligning, pressing and draw-in device, which has at least one driven draw-in roller to pull the work piece in and against said entry straightedge guide, and at least one driven pressure roller to press the work piece against the entry straightedge guide. 
     
     
       2. Machine according to claim 1, characterized in that the front-mounted pre-conveying device is comprised of at least two revolving chain conveyors (18, 20) which have directions of movement and run parallel to the primary conveying means (10), form support surfaces for the work pieces (W), and include carriers (26) arranged at intervals on the support surfaces of said chain conveyors, and that associated carriers (26) of the two chain conveyors (18, 20) are aligned with each other perpendicularly to the direction of movement of the chain conveyors. 
     
     
       3. Machine according to claim 2, characterized in that the carriers (26) are arranged so as to be capable of being lowered. 
     
     
       4. Machine according to claim 2, characterized in that the chain conveyors (18, 20) of the front-mounted pre-conveying device laterally overlap a primary chain conveyor of the primary conveying means (10). 
     
     
       5. Machine according to claim 2, characterized in that one of the two chain conveyors is a component of the primary conveying means. 
     
     
       6. Machine according to claim 2, characterized in that one (20) of the two chain conveyors can be adjusted laterally to its direction of movement. 
     
     
       7. Machine according to claim 6, characterized in that the one chain conveyor (20) can be adjusted together with an adjustable straightedge guide (16). 
     
     
       8. Machine according to claim 4, characterized in that one (18) of the two chain conveyors of the front-mounted pre-conveying device is connected with the primary chain conveyor (10) at said overlap. 
     
     
       9. Machine according to claim 8, characterized in that an endless belt (32) is arranged at said overlap between and adjacent to the one chain conveyor (18) and the primary chain conveyor (10). 
     
     
       10. Machine according to claim 2 or 4, characterized in that diverting roller shafts (36, 40) of the primary chain conveyor (10) and of the two chain conveyors (18, 20) are mechanically coupled with each other at said overlap for a synchronous movement. 
     
     
       11. Machine according to claim 1, characterized in that said at least one draw-in roller (22) can be adjusted between two positions, and in that in one position the work piece (W) is drawn in against the entry straightedge guide (14) and in the other position the work piece (W) is drawn in against a second, adjustable straightedge guide (16). 
     
     
       12. Machine according to claim 11, characterized in that said at least one draw-in roller (22) and said at least one pressure roller (24) are arranged on a drive head (54) which can be set in a third positions, in which said two positions are such that the pressure roller (24) does not engage with the work piece (W), and in the third positions the draw-in roller (22) does not engage with the work piece (W). 
     
     
       13. Machine according to claim 12, characterized in that a center of the drive head (54) is a driven beveled gear transmission (56) having a drive entry gear (58), a first driven output gear (62) for the draw-in roller (22) and a second driven output gear (64) for the compression roller (24), whereby these driven gears are pivotable with their associated rollers (22,24). 
     
     
       14. Machine according to claim 12 or 13, characterized in that the drive head (54) can be shifted along an adjustment rod (72), so that the draw-in roller (22) can be brought out of engagement and the compression roller (24) can be brought into engagement with the work piece (W). 
     
     
       15. Machine according to claim 14, characterized in that an angle (α) of the adjustment rod (72) relative to an upper surface of the work piece is inclined such that in one end position of the adjustment rod the draw-in roller (22) is in engagement with the work piece (W) and at another end position the draw-in roller is out of engagement therewith. 
     
     
       16. Machine according to claim 12, characterized in that the drive head (54) is rigidly connected with the compression assembly (78) of the primary conveying means (10). 
     
     
       17. Machine according to claim 2, characterized in that the chain conveyors (18, 20) of the front-mounted pre-conveying device are arranged on one side of the primary conveying means (10). 
     
     
       18. Machine according to claim 2, characterized in that one of the chain conveyors (18, 20) of the front-mounted pre-conveying device is arranged on each side of the primary conveying means (10), respectively. 
     
     
       19. Machine according to claim 5, characterized in that a first entry side diverting wheel (34) driven by means of the primary chain conveyor (10) is mechanically coupled for driving purposes with a second entry side diverting wheel (37) of an adjacent chain conveyor (19). 
     
     
       20. Machine according to claim 19, characterized in that a third diverting wheel (39) of the adjacent chain conveyor (19) is biased away from the first entry-side diverting wheel (37) by means of a strongly tensed spring. 
     
     
       21. Machine according to claim 4, characterized in that one (18) of the two chain conveyors of the front-mounted pre-conveying device is frictionally connected with the primary chain conveyor (10) at said overlap. 
     
     
       22. Machine according to claim 4, characterized in that one (18) of the two chain conveyors of the front-mounted pre-conveying device is form-fittingly connected with the primary chain conveyor (10) at said overlap. 
     
     
       23. Machine according to claim 2, characterized in that said at least one drive draw-in roller (22) is arranged to pull the work piece (W) in and against an adjustable straightedge guide (16), and said at least one driven pressure roller (24) is arranged to press the work piece (W) against the adjustable straightedge guide (16), when the work piece is to be brought into contact with the carriers (26).